Color television image reproduction system



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COLOR TELEVISION IMAGE REPRODUCTION SYSTEM Filed Aug. 10, 1964 24 Sheets-Sheet 4 2-22u S.E S TRIP & 0% W? BEAM SECONDARY EMISSION COLLECT CB/LCKINC REFERENCE 4-:2 4-H 447i R 0BRGBRGBRGBRGB/RGBRCBRGBRZQ BR CRT SCREEN DETAIL 4-l0 1 I a 1 V I q i 1 PHASE REFERENCE PULSES i /B J -o l SWITCHING PULSES i R MIXED VIDEO /}i+ G. \D\

I 1 1 HUE SEPARATION DEFL. SIG. l 0

1 F COLOR SATURATION SlG. II 0 k I O L REVERSE*SCAN MINOR-DEFLECTION SIG.

SELECT BLUE LECT GREEN SELECT RED COMPOSITE CHROMTNANCE SELECT SIC. F+|/2 E+O+ 1/2 B AUTO ERROR CORRECTION DEFL. SIC.

CONTROL WAVEFORM SWITCHING FE.&?

April 4, 1967 c. A. WASHBURN COLOR TELEVISION IMAGE REPRODUCTION SYSTEM 24 Sheets-Sheet 6 Filed Aug. 10, 1964 OUTPUT TIME A ril 4, 1%? c. A. WASHBURN 3,

COLOR TELEVISION IMAGE REPRODUCTION SYSTEM Filed Aug. 10, 1964 24 Sheets-Sheet '7 0 PHASE COLOR BURST PHASE CHROMINANCE PLANE MAX. WHiTE F5 6 MAX. WHITE BRIGHTNESS (A VECTOR TYP.)

COLOR CONE FEGQ 8Q 24 Sheets-Sheet 8 C. A. WASHBURN COLOR TELEVISION IMAGE REPRODUCTION SYSTEM POSITIVE HALF CYCLES x J r! 0 2 m 7 T e M L Tw m a L 4 l J! N W A m 0 m H Wk c 0 L A N w A II J I N G M G A m DNA! A m C W H I 0 F Y H H .l S H 00 Y L 6 V A D N v D N I!!! 0% TY] M m M m A. i A I m M II R +0 m m m I U fl R I S E U /I m nuu u W DIM 0 A EEEZT n C m 5 555% I w m All. 0

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Filed Aug. 10, 1964 April R, 1%?

Filed Aug. 10, 1964 C. A. WASHBURN COLOR TELEVISION IMAGE REPRODUCTION SYSTEM 24 Sheets-Sheet 9 1H6 VIDEO |N-Y+C+SYNC .C Y+D-A AMPL H-l? um Il-|5 CHROM. SYNCH, CARRIER DETECTOR w AMPUC) I & FILTER R u-zo (|-.5MC.) E+ LOW PASS A H43 R VIDEO ELYPTICAL OUT T0 CIRCULAR L RRRRRR 2M0 I?! SUBCARRIER nous. 11-25 REE -12 GENERATOR mam/ls" PHASE REFERENCE PULSES (HGJHH) R--| 1 -59 Mall-55 r2 HA?" J +v u 40 H141 I AMPLITUDE 11-42 DETECTOR AMP j CLIPPER DECODER 2-13 Apnfi 4,; 3967 c. A. WASHBURN COLOR TELEVISION IMAGE REPRODUCTION SYSTEM 24 Sheets-Sheet 11 Filed Aug. 10, 1964 m 25,96 zocbmmmoo mo x3833 EMEES E25 $2: ZESSEQ S a: 22E 33E 253:5

is: 022% E; 32:25:: E E; I J 8-:

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Filed Aug. 10, 1964 C A. WASHBURN COLOR TELEVISION IMAGE REPRODUCTION SYSTEM E HORIZONTAL AF IIvITI-I ERROR POSITION 24 Sheet-Sheet 12 CIRCUIT PHASE CONTROL ERROR VOLTAGE FROM FIG. L:

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LEFT l2 4-II RIGHT F T T T PHOSPHOR STRIPES i END fi/ SEC. EMIssIvE sTRIPs REF. EDGE Aprifl 4, 1%? c. A. WASHBURN COLOR TELEVISION IMAGE REPRODUCTION SYSTEM 24 Sheets-Sheet 14 Filed Aug. 10, 1964 2L 2 v 2550 532i P 4, 3957 c. A. WASHBURN 3,3E2,779

COLOR TELEVISION IMAGE REPRODUCTION SYSTEM Filed Aug. 10, 1964 2A Sheets-Sheet l5 R3 (53% SATURATION) R-2 (67% SATURATION) Z i/R-I (100% SATURATION) 801E151 DISPLACEMENT AMPLITUDE e ApriL 4, 1967 C. A. WASHBURN COLOR TELEVISION IMAGE REPRODUCTION SYSTEM 24 Sheets-Sheet 19 Filed Aug. 10, 1964 HH REF. SAWTOOTH (ERROR POS.)

PM PHASE REF. TRIGGER PULSE KK PHASE REF SAINTOOTH ZERO SATURATION LEVEL LL VELOCITY MOD. SAVITOOTH IL E v E L k LA E W N LV N F m M M UMU N FC S M O 0 we PP SIMULATION SAWTOOTH RESULTANT,PP AND KK, LL, MM OR NN I I IiE RR COINCIDENCE STEP VOLTAGE \l N w I S L 0 A P N U G 0 M EL EL Dn LII E C .IU I N ELH NR U D 5 GA Cl m N C EM E M M M w B U 00 W DI N T w u w w R H CIDI DI A C LL LW W EL H ELAIL L ms w R000 C LL 5 0060 D [L [I lc D E rf TL -I I 1 K I I u E U J uu I TI Wu H 5 E M H DI I L I II I A l l I V M W11 PHASE COMPENSATED REFSUBC.

I v T I IL L K K D N A Du DH N N M IR 0 U B RM ERRORICORTREF. POSITION AXIS HUE SIGNAL AMPLITUDE TIME April 4, 1967 c. A. WASHBURN 3,312,779

COLOR TELEVISION IMAGE REPRODUCTION SYSTEM Filed Aug. 10, 1964 24 Sheets-Sheet 2O I-25 FIG. 23 FIGQ I ERROR FREQ. 1 VECTOR DIAGRAM- CONTROL |9-l5 PHASE SHIFT MODULATOR I5-4I\ I R 5-45 +V I I T0&FIIG6S.I5 I I 2324 I I I 2-I4 FROM H5] W950 WDEO VIDEO swncu OUTPUT T0 LUIYIIIIAIICE 25-I3 AMP 2-I5 INPUT URUUTU E I I 2 CT SYSTEM 2-25, I

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DETECTOR MINOR CARRIER 0 WM DER TU FROM 0 OUT LHUE sATsTc.

MINOR REFSUB- 25-I6 DEFL I SQ SWITCH 7 I I9-2I CUPPER SWITCH +5 W" |9-52 AMPL. PULSE E SAWTOOTH GEN. I

PHASE REF SAWTOO 25-2I FE G a 

1. A COLOR TELEVISION IMAGE REPRODUCTION SYSTEM COMPRISING MEANS HAVING AN INPUT CIRCUIT ADAPTED TO RECEIVE A CHROMINANCE CARRIER TYPE OF COLOR TELEVISION VIDEO SIGNAL HAVING A CHROMINANCE CARRIER SIGNAL WITH CHROMINANCE REFERENCE PHASE AND CYCLIC PERIODICITY AND INCLUDING A CATHODE RAY IMAGE REPRODUCTION TUBE FOR REPRODUCING FROM SAID SIGNAL A MONOCHROME TELEVISION IMAGE, SAID TUBE HAVING A FLUORESCENT SCREEN COMPOSED OF REPETITIVE SETS OF PLURAL PRIMARY-COLOR-RELATED LIGHTEMISSIVE PHOSPHOR STRIPES ORIENTED TRANSVERSE TO THE LINE SCANNING DIRECTION AND HAVING A COMPOSITE SET WIDTH CORRESPONDING SUBSTANTIALLY TO THE CONSTANTVELOCITY SCANNING DISPLACEMENT OF THE CATHODE SET BEAM DURING AN INTERVAL HAVING A PRESELECTED PROPORTIONAL RELATION TO SAID REFERENCE CYCLIC PERIODICITY, SAID SCREEN INCLUDING A PLURALITY OF BEAM-POSITION INDEXING STRIPE ELEMENTS EACH ASSOCIATED WITH A NONEMISSIVE REFERENCE POSITION PORTION BOTH ORIENTED TRANSVERSE TO THE LINE SCAN DIRECTION AND SPACED ACROSS SAID SCREEN IN LIKE POSITIONAL RELATIONSHIP TO SAID PHOSPHOR STRIPE SETS TO PROVIDE BY BEAM SCAN PERIODIC CHANGES OF AN EMISSIVE ENERGY LEVEL INDICATIE OF A PREVAILING HORIZONTAL POSITIONAL RELATIONSHIP BETWEEN SAID BEAM AND SUCCESSIVE ONES OF SAID INDEXING STRIPE ELEMENTS, MEANS RESPONSIVE TO THE AMPLITUDE AND PHASE OF SAID CHROMINANACE CARRIER SIGNAL FOR CONTROLLING THE LINE SCAN MOTION OF SAID CATHODE RAY BEAM AT SUBSTANTIALLY SAID DISPLACEMENT-INTERVAL PERIODICITY TO EFFECT SUBSTANTIALLY UNIFORM-VELOCITY SCANNING MOTION OF SAID BEAM DURING REPRODUCTION OF NEUTRAL COLOR IMAGE AREAS AND TO EFFECT LINE SCANNING MOTION OF SAID BEAM WITH VARIABLE VELOCITY AT SUBSTANTIALLY SAID DISPLACEMENT-INTERVAL PERIODICITY FOR HUE SELECTION REPRODUCTION OF IMAGE AREAS, AND MEANS OPERATIVE AT PERIODIC ERROR CORRECTION INTERVALS AND RESPONSIVE TO EACH OF SAID PERIODIC CHANGES OF EMISSIVE ENERGY LEVEL FOR EFFECTING A CORRESPONDING DEFLECTION ADJUSTMENT OF THE PREVAILING POSITION OF SAID BEAM DURING EACH SAID INTERVAL TO MOVE SAID BEAM SUBSTANTIALLY TO THE ADJACENT NON-EMISSIVE REFERENCE POSITION PORTION AND THEREBY MAINTAIN A PRESELECTED POSITIONAL RELATIONSHIP THEREOF TO SAID INDEXING STRIPE ELEMENTS AND THUS TO SAID PHOSPHOR STRIPE SETS. 